Could you quit Sage, remove the directory ~/.sage/notebook/
and re-start Sage, as recommended in
http://doc.sagemath.org/html/en/reference/notebook/sagenb/notebook/notebook_object.html
Byte wrote:
>
> I managed to get the latest version of Sage compiled with openssl, however
> whenever I try to run notebook(secure=True) I get this error:
> '
> OpenSSL.crypto.Error: [('PEM routines', 'PEM_read_bio', 'no start line')]
>
>
> Failed to load application: [('PEM routines', 'PEM_read_bio', 'no start
> line')]
>
>
>
> sage: version()
> 'SageMath Version 7.1, Release Date: 2016-03-20
> Ubuntu 16.04
>
> I have no idea how to fix this and would like to both find an answer and
> distribute it to others
> I'm not a programmer, I'm a mathematician.
>
> Thanks in advance
>
>
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